A side-by-side comparison of two authentication & identity platforms, based on the 1,440 Authentication sites tracked by Site Stats Database.
Last updated
| Metric | Auth0 | Firebase Auth |
|---|---|---|
| Websites | 284 | 371 |
| Market share | 20% | 26% |
| Share of top 10K sites | 0.17% | 0.08% |
| Share of top 100K sites |
|---|
| 0.10% |
| 0.04% |
| Rank | #4 | #1 |
|---|
| Median DR | 62 | 34 |
|---|
| Average DR | 57 | 37 |
|---|
| Median keywords | 2,763 | 1,047 |
|---|
| Median referring domains | 1,975 | 548 |
|---|
| Median domain age | 22 yrs | 9 yrs |
|---|
| Average domain age | 20 yrs | 12 yrs |
|---|
| Average monthly traffic | 315,510 | 112,275 |
|---|
| Combined monthly traffic | 89,604,748 | 41,654,118 |
|---|
Monthly snapshots of each segment, 2026-06 to 2026-07. Website counts move when our catalog grows; the share of tracked sites is normalized, so it only moves when real prevalence changes.
Websites
Share of tracked sites
Combined monthly traffic
284 websites · rank #4
Top industries
Top markets
371 websites · rank #1
Top industries
Top markets
Firebase Auth is used by more websites in our catalog: 284 use Auth0 and 371 use Firebase Auth.
Auth0 sites have the higher median Ahrefs Domain Rating (Auth0: 62, Firebase Auth: 34).
Between 2026-06 and 2026-07, Auth0 went from 0.04% to 0.03% of all tracked sites, while Firebase Auth went from 0.05% to 0.04%. Firebase Auth is gaining ground faster in our index.
0 websites in our catalog use both Auth0 and Firebase Auth.
Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.
Citation
Site Stats Database. "Auth0 vs Firebase Auth." Site Stats Database, July 1, 2026. https://sitestatsdb.com/technologies/authentication/compare/auth0-vs-firebase-auth
Site Stats Database tracks 284 websites using Auth0 and 371 using Firebase Auth, each enriched with full monthly traffic history, authority, keywords, referring domains, and the complete detected tech stack. We detect every authentication / identity platform by crawling each site's HTML, response headers, and DNS; traffic and SEO metrics come from DataForSEO and Ahrefs. Everything refreshes at least monthly.
See plans & pricing| English |
| 80 |
| 119,137 |
| 41,492 |
| 25 yrs |
| 9,497,424 |
| Auth0 |
| deltadental.com | English | 79 | 165,073 | 8,689 | 31 yrs | 9,284,703 | Auth0 |
| alaskaair.com | English | 82 | 163,428 | 26,443 | 30 yrs | 9,118,308 | Auth0 |
| hawaiianairlines.com | English | 77 | 37,886 | 11,161 | 26 yrs | 3,325,412 | Auth0 |
| intermiamicf.com | English | 72 | 19,309 | 10,801 | 7 yrs | 2,373,983 | Auth0 |
| loewshotels.com | English | 79 | 61,307 | 12,966 | 30 yrs | 2,324,532 | Auth0 |
| harpercollins.com | English | 87 | 154,954 | 73,645 | 32 yrs | 2,201,742 | Auth0 |
| okta.com | English | 90 | 65,171 | 41,885 | 22 yrs | 2,192,782 | Auth0 |
| breville.com | English | 75 | 56,022 | 10,032 | 25 yrs | 2,098,893 | Auth0 |
| English |
| 75 |
| 55,636 |
| 13,148 |
| 31 yrs |
| 2,145,093 |
| Firebase Auth |
| crowncoinscasino.com | English | 60 | 683 | 3,128 | 3 yrs | 1,900,465 | Firebase Auth |
| monkeytype.com | English | 74 | 2,542 | 2,613 | 6 yrs | 1,428,451 | Firebase Auth |
| arttoframe.com | English | 46 | 27,500 | 1,479 | 21 yrs | 1,418,313 | Firebase Auth |
| visible.com | English | 73 | 34,963 | 4,205 | 31 yrs | 1,146,763 | Firebase Auth |
| consequence.net | English | 79 | 264,522 | 52,877 | 26 yrs | 1,141,511 | Firebase Auth |
| tradukka.com | English | 44 | 73,161 | 6,412 | 16 yrs | 1,009,005 | Firebase Auth |
| texasfootball.com | 56 | 32,067 | 4,860 | 28 yrs | 925,626 | Firebase Auth |
| hoover.org | English | 79 | 53,870 | 26,702 | 29 yrs | 745,334 | Firebase Auth |